Water Resistant Screen Ink
Water resistant screen ink is a screen-printing ink formulated to maintain film adhesion and graphic integrity after exposure to moisture, water spray, washing cycles, or outdoor humidity.The ink forms a cured coating layer that reduces water penetration into the pigment-resin structure.
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Product Introduction
How Water Resistant Screen Ink Works
During screen printing, the ink passes through mesh openings and deposits onto the substrate surface.
After printing:
Water or solvent evaporates
Resin particles coalesce
Crosslinking reactions form a continuous film
The cured coating reduces water penetration pathways
The cured ink layer resists:
Surface swelling
Pigment migration
Film softening
Delamination
Water resistance depends on:
Resin chemistry
Crosslink density
Film thickness
Curing temperature
Substrate surface energy
Incomplete curing may leave hydrophilic regions inside the coating film, which can absorb moisture and weaken adhesion.
| Parameter | Details |
|---|---|
| Curing Wavelength | 365-395nm (UV-LED compatible) |
| Curing Time | 2-5 seconds (60-100mJ/cm²) |
| Wash Resistance | ≥50 cycles (ISO 105-C10, 60℃) |
| Substrates | Cotton, polyester, nylon, blended cloth labels |
| Viscosity | 150-300 cP (adjustable for flexo presses) |
| Color Range | CMYK + custom Pantone spot colors |
| Shelf Life | 12 months (sealed,15-25℃) |
Industrial Applications
Water resistant screen ink is used on textile substrates that undergo repeated washing, sweat exposure, outdoor humidity, and mechanical flexing during use.
Typical applications include:
Outdoor sportswear
Safety garments
Reflective workwear
Industrial uniforms
Polyester training apparel
Cotton blend promotional textiles
FAQ:
Why does screen ink crack after repeated washing on textile garments?
Ink cracking usually occurs when the cured coating film cannot follow fabric deformation during washing and stretching cycles.
Common causes include:
Excessive ink film thickness
Low flexibility resin systems
Insufficient curing temperature
High curing shrinkage
Polyurethane-modified inks are commonly used on polyester sportswear because the resin film can bend with the textile structure during repeated movement.
Why is a white underbase layer used in textile screen printing?
A white underbase layer blocks fabric color from affecting the top graphic layer.
This is common on:
Black polyester garments
Dark cotton fabric
Reflective safety clothing
Titanium dioxide pigments inside the underbase layer scatter visible light and reduce color show-through from the textile surface.
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